Xref: utzoo comp.sys.mac.misc:12187 comp.sys.mac.hardware:11240
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!cs.utexas.edu!solo.csci.unt.edu!vaxb.acs.unt.edu!kenc
From: kenc@vaxb.acs.unt.edu
Newsgroups: comp.sys.mac.misc,comp.sys.mac.hardware
Subject: Re: upgrading mac SE with Gemini accelerator
Message-ID: <1991May17.134107.46858@vaxb.acs.unt.edu>
Date: 17 May 91 13:35:07 GMT
References: <1991May12.155406.22219@maverick.ksu.ksu.edu> <6398@crystal9.UUCP>
Distribution: na
Organization: University of North Texas
Lines: 41

In article <6398@crystal9.UUCP>, derosa@motcid.UUCP (John DeRosa) writes:
> kentiler@matt.ksu.ksu.edu (Kent Iler) writes:
> 
>>Hi,  I was wondering if anyone has any experiance with the Gemini accelerator
>>boards fro an SE.  I was looking to boost my little SE up to 40 mhz.  Only
>>thing, I would like to have more than the 4 meg RAM that I have now, which
>>is the max for an SE.  Anyone have any suggestions?  Thanks.
> 
> The limit you will always have is 4 megs, no matter which accelerator
> that you get.  The problem is your SE ROMs, they only support 4 megs.

This is a popular misconception.  I'm running up to 15MB of memory right now on
my Mac Plus, (using the Connectix program Virtual, and a Gemini board
upgradable to 40Mhz, just by buying some chips.)  Since this is the exact same
board model that gets added to an SE, I don't see why I could do it on a Plus,
and not on an SE...

Also, I talked with a gentleman at Connectix, and he said that Version 3 of
Virtual, combined with system 7, will allow those of us who have Gemini boards
to use the 4MB SIMMs on the Gemini board.  I don't beleive that we can go
above 16MB as of now, but really, isn't that plenty?

> The only option around this is to upgrade to an SE/30.  This will
> get you a 68030 so the VM will work in system 7.0.  Also you get 
> 8 megs of hard RAM capability.   How?  New ROMs!

Notice, Kent was asking about the Gemini board, which has a full 68030 
on-board.  (For a small price break, it CAN be bought with a 68020, and then 
upgraded to a 68030 just by replacing the cpu. The coprocessor slot can use 
either a 68881 or a 68882.  I just recently bought a 40Mhz 68882 from Don Novy,
and it works great, so that to upgrade to 40Mhz, all I'll have to buy is the
faster cpu, and the crystal...;)

As far as the ROMS go, Virtual takes care of that nicely, thank you.  Running
under Multifinder, the only time much switching takes place right now on my
machine, is when I swap between programs.  That really only takes .25 of a
second, so the lag is not particularly noticable.

| Ken Corey  kenc@vaxb.acs.unt.edu  ken@isect.lonestar.org           |
| "Ladies strewn, those made to witness his charm, never daring or   |
|  allowed to touch the man behind the machine."  -Leah              |